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authorRoger Quadros <rogerq@ti.com>2014-10-21 16:53:27 +0300
committerBrian Norris <computersforpeace@gmail.com>2014-11-19 23:25:06 -0800
commit5a66088bffd9a5251e96ca5d0d46456ab9196287 (patch)
tree91bdd8b45c770fe3e3910d54357e09aff83f2cd2 /drivers/mtd
parent096916610f415e07cfe71d71a391011c617be5ed (diff)
downloadop-kernel-dev-5a66088bffd9a5251e96ca5d0d46456ab9196287.zip
op-kernel-dev-5a66088bffd9a5251e96ca5d0d46456ab9196287.tar.gz
mtd: mtd_oobtest: Show the verification error location and data
Add a function memcmpshow() that compares the 2 data buffers and shows the address:offset and data bytes on comparison failure. This function does not break at a comparison failure but runs the check for the whole data buffer. Use memcmpshow() instead of memcmp() for all the verification paths. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/tests/oobtest.c36
1 files changed, 29 insertions, 7 deletions
diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c
index dc4f960..edd859d 100644
--- a/drivers/mtd/tests/oobtest.c
+++ b/drivers/mtd/tests/oobtest.c
@@ -115,6 +115,26 @@ static int write_whole_device(void)
return 0;
}
+/* Display the address, offset and data bytes at comparison failure */
+static int memcmpshow(loff_t addr, const void *cs, const void *ct, size_t count)
+{
+ const unsigned char *su1, *su2;
+ int res;
+ int ret = 0;
+ size_t i = 0;
+
+ for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--, i++) {
+ res = *su1 ^ *su2;
+ if (res) {
+ pr_info("error @addr[0x%lx:0x%x] 0x%x -> 0x%x diff 0x%x\n",
+ (unsigned long)addr, i, *su1, *su2, res);
+ ret = 1;
+ }
+ }
+
+ return ret;
+}
+
static int verify_eraseblock(int ebnum)
{
int i;
@@ -139,8 +159,9 @@ static int verify_eraseblock(int ebnum)
errcnt += 1;
return err ? err : -1;
}
- if (memcmp(readbuf, writebuf + (use_len_max * i) + use_offset,
- use_len)) {
+ if (memcmpshow(addr, readbuf,
+ writebuf + (use_len_max * i) + use_offset,
+ use_len)) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
@@ -167,9 +188,9 @@ static int verify_eraseblock(int ebnum)
errcnt += 1;
return err ? err : -1;
}
- if (memcmp(readbuf + use_offset,
- writebuf + (use_len_max * i) + use_offset,
- use_len)) {
+ if (memcmpshow(addr, readbuf + use_offset,
+ writebuf + (use_len_max * i) + use_offset,
+ use_len)) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
@@ -233,7 +254,7 @@ static int verify_eraseblock_in_one_go(int ebnum)
errcnt += 1;
return err ? err : -1;
}
- if (memcmp(readbuf, writebuf, len)) {
+ if (memcmpshow(addr, readbuf, writebuf, len)) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
@@ -610,7 +631,8 @@ static int __init mtd_oobtest_init(void)
err = mtd_read_oob(mtd, addr, &ops);
if (err)
goto out;
- if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
+ if (memcmpshow(addr, readbuf, writebuf,
+ mtd->ecclayout->oobavail * 2)) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
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